If a module exists in `sys.modules` already, `load_module` has to return it. Fixes https://bitbucket.org/pytest-dev/pytest/issue/435 --HG-- branch : fix-reload
If a module exists in `sys.modules` already, `load_module` has to return it. Fixes https://bitbucket.org/pytest-dev/pytest/issue/435 --HG-- branch : fix-reload